Module Not Found Error for siteSettings on Vercel Build (Works Locally)

This is a common issue that usually comes down to case-sensitivity differences between your local environment and Vercel's build environment. Here's what's likely happening:

The Root Cause:

• Your local machine (especially on macOS or Windows) has a case-insensitive file system
• Vercel's build environment uses Linux, which has a case-sensitive file system
• If you're importing siteSettings but the actual file is named SiteSettings.js (or vice versa), it works locally but fails on Vercel

How to Fix It:

1. Check your import statement casing - Look at where you're importing the siteSettings schema file. The import path must match the actual filename exactly, including capitalization:

   // If your file is siteSettings.js
   import siteSettings from './siteSettings'
   
   // NOT
   import siteSettings from './SiteSettings'

2. Check the actual filename - Verify the exact casing of your file in your file explorer or with ls in terminal. Don't trust your IDE's display.

3. Check the folder path casing too - The same case-sensitivity applies to folder names in the import path.

4. Verify your schema index file - If you're exporting from an index file (like schemas/index.js), make sure the import there also matches exactly:

   export {default as siteSettings} from './siteSettings'

Quick Debug Steps:

• Run git ls-files | grep -i sitesettings to see exactly how Git has tracked the filename
• Check your schemas/index.js (or wherever you're aggregating schemas) for the import statement
• Look for any dynamic imports or require statements that might reference this file

Since you mentioned it works locally but not on Vercel, and you've already tried reinstalling dependencies, case-sensitivity is almost certainly the culprit. Even a single character difference in capitalization will cause this exact error pattern.